Mechanical movement.



L. H. BATEMAN.

MECHANICAL MOVEMENT.

APPLICATION FILED JAN. 21, ms.

1 ,2G 1 ,9 1 9 Patented Oct. 17, 1916.

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L. H. BATEMAN.

' MECHANICAL MOVEMENT.

APPLICATION FILED JAN. 27, 1916.

1,201,919.- Patented Oct. 1916.

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LOFTUS HANSON BATEMAN, OF MANCHESTER; ENGLAND.

MECHANICAL MOVEMENT.

Patented Oct. 17, 1916.

Application filed .l'anuary 27, 1916. Serial in. 74,678.

To all whom it may concern:

Be it known that I, Lor'rus HANSON BA'rnMAN, a subject of the King of Great Britain and Ireland, and resident of 9 Buller road, Longsight, Manchester, in the county of Lancaster, England, have invented certain new and useful Improvements Relating to Mechanical Movement, of which the following is a'specification.

This invention relates to planing andlike machines and particularly to themeans employed for giving feed motion to the cutting tool ortools. v

- Heretofore the feed mechanism has been actuated from a ratchet wheel which receives its motion from a member of the refixed stops to withdraw the pawls from the ratchet wheel after a predetermined period of movement in one or the other direction. With this arrangement, the pawl is actuating the. feed mechanism until the moment that it is withdrawn clear of the ratchet wheel, with the result that-there is excessive wear upon and damage done to the extreme edge of the pawl and wheel teeth. Further, a certain period elapses from the time reratchet wheel takes place until the pawl engages the said wheel, necessitating an excessive overrun of the planer or like table to enable the feed motion to be completed be- The objects of my present invention are to provide means whereby the pawls are caused to transmit'motion to the feed mechanism only while they are in full engagesaid motion being completed and the feed mechanism held against further movement while the pawls are withdrawn from the ratchet wheel, and to so'construct the feed I actuating means that motion is transmitted to the feed mechanism practically immediately the direction of rotation of the ratchet wheel is reversed.

My invention comprises the combination j and arrangement with a member, such as a ratchet wheel, in continuous operative connection with the planer table driving gear, of a second member, such as a pawl car rier, adapted to be placed in intermittent operative connection with the aforesaid member, feed actuating gear adapted to be placed in intermittent operative connection with said second member, and means for locking said feed actuating gear while the operative connection between the first and second members is being interrupted.

My invention further comprises the'improved arrangement of the mechanisinhereinafter described.

Referring .to the two'accompanying sheets of explanatory drawings, Figure l is an elevation showing the general arrangement of the feed operating mechanism. Fig.2 is a part plan view and part sectional view on the line A B of Fig. 1, looking in the direction of the arrow C. Fig. 3 is a sectiona elevation on the line D E of Fig. l.

The same reference letters in the three views indicate the same parts.

In the illustrated application of my invention to the feed mechanism of a planing machine, I key the ratchet wheel a upon a shaft or spindleb in operative connection with a member 0 carrying for example the bull wheel pinion or driving the planer table, and I dispose around the ratchet wheel a and upon said shaft-or spindle a member d forming a carrier for two pawls c, f mounted upon a common pin 9, and having a number of teeth '72, on its periphery which engage the teethof a quadrant z from which the planer feed train receives its intermittent movements. 'Each of the two pawls is formed as a bell crank lever, one end acting under the influence of a spring 7', j to engage the teeth of the ratchet wheel, and the other end serving in combination with a cam surface 70, 70 to withdraw the pawl from engagement with the ratchet wheel. The cam surface for each pawl is formed upon a pivoted arm m, m the movement of which away from the pawl may be limited by an adjustable stop. In the illustrated example, fixed stops n, n areemployed. A spring 0 preferably holds the pivoted arms slightly clear of their stops and against the peripheral edge of the pawl carrier 0? which forms another stop therefor, 'so that when a pawl has been withdrawn clear of the ratchet wheel by its cooperating cam surface, the spring 0 which has been compressed, expands and by forcing the cam arm back upon the edge of the carrier, gives a small additional movement to the pawl to place it quite clear of the ratchet wheel.

Upon the pawl carrier I provide a member 29 having one radial edge shaped to the configuration of the flank of one of the:

teeth on said carrier, while the peripheral edge of the member is at the same distance from the center of the carrier as the peripheral edge or apex of the teeth thereon. This construction is clearly shown in Fig. 1. The quadrant 2' has 3,150 111, member; 9 thereon with one radial face shaped to the configuration of the flank of one of the'quadrant teeth and with its peripheral face shaped to correspond or mate with the peripheral edge of the aforesaid member p. The quadrant also has a projecting arm 1* for engaging the peripheral edge of the pawl carrier adjacent to its teeth. 7 i

. lVith the arrangement aforesaid, when the direction of rotation of the ratchet wheel a is reversed, due to the reversal of the direction of motion of the planer table driving gear and memberc, one or other of the pawls e, fengages the teeth of the ratchet wheel so that the pawl carrier d is given a rotary movement. The teeth lz. upon said pawl carrier engage the teeth 2' upon the quadrant and impart a rotary movement to the latter. If such movement is in the service direction as indicated by the arrow F (Fig. 1) during other direction by engaging the peripheral edge of the teeth h on the pawl carrier or of the member 10 on the latter. During the period thatthe quadrant i is stationary, the pawl carrier (Z continues to-rotate While the active pawl, in this case f, is withdrawn from the ratchet wheel by its cam 71?. A brake band 8 prevents overrunning of the pawl carrier.

- When the pawl carrier (Z is actuated in the reverse direction to that indicated by the arrow F toreturn the connecting rod t or like feed actuating member to its initial position, pawl e is withdrawn from the ratchet wheel a bythe action of the cam part 70 on the outer end of the pawl while the quadrant I i is moving, there being then no danger of the pawl and ratchet wheel being damaged.

For convenience of assembly and examination, I preferably mount the ratchet wheel upon a spindle 6 (see Fig. 3), extending through the planer housing into the end of one of the spindles, as 0, in the table gear train, the fixed member it upon which the cam arms m, m are pivoted being secured upon the housing. A key 1) extending through a slot in the spindle b aforesaid engages a recess in the end face of the ratchet wheel a. The pawl carrier dismounted upon the spindles between the fixed member a ative connection with the aforesaid member,

feed actuating gear in intermittent operative connection with said second member, and means adapted to lock said feed actuating gear while the operative connection between the first and second members is beinginterrupted, as set forth.

2. In tool feed mechanism for planing and like machines, in combination, areversible part of the machine, a ratchet wheel in continuous operative connection with said reverslble part, a pawl carrler 1n intermittent operatlve connection with sald ratchet wheel, feed actuating gear in intermittent operative connection with said pawl carrier, and means adapted to lock said feed actuating gear while the operative connection between the ratchet wheel and pawl carrier is being interrupted, as set forth.

3. In tool feed mechanism for planing and like machines, in combination, a reversible part of the machine, a ratchet wheel in continuous operative connection with said reversible part, a pawl carrier in intermittent operative connection with said ratchet wheel, gear teeth upon said carrier, a quadrant engaging said gear teeth, and means adapted to lock said quadrant in a stationary condition while the operative'connection between the ratchet wheeland pawl carrier is being interrupted, as set forth.

4:. In tool feed mechanism for planingand like machines, in combination, a reversible part of the machine, a ratchet wheel in continuous operative connection with said reversible part, a pawl carrier, two pawls upon said carrier for engaging said ratchet wheel, means for withdrawing said pawls from operative connection with the ratchet wheel, gear teeth upon a portion of said pawl carrier, a quadrant engaging said gear teeth and inter-engaging elements adapted to lock said quadrantin a stationary condition while the operative connection between the pawls and ratchet wheel is being interrupted, as set forth.

5. Intool feed mechanism for planing and like machines, in combination, a reversible member of the machine gear train, a spindle in operative connection with said member, a ratchet wheel upon said spindle, a cross key providing driving connection between said ratchet Wheel and spindle, means securing said key to said spindle, a pawl carrier, two pawls facing in opposite directions upon said carrier, two spring pressed pivoted arms adapted to engage extensions upon said pawls for withdrawing the latter from operative connection with the ratchet wheel, gear teeth upon a portion of said pawl carrier, a quadrant engaging said gear teeth, interengaging elements upon said carrier and quadrant, an arm upon said quadrant adapted to engage the pawl carrier to form a stop,

said elements and stop arm together locking said quadrant in a stationary condition while the operative connection between the pawls and ratchet wheel is being interrupted, and abrake to prevent over-running of the carrier,as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

LOFTUS HANSON BATEMAN. Witnesses:

ARTHUR HUGHES, HILDA HUGHES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latentl.

Washington, D. C. 

